S-91074A374 2.33" ID x 3.35" OD Extreme-Vibration-Resistant Wedge Lock Washers

Extreme-Vibration-Resistant Wedge Lock Washers

1329FA00050 Extreme-Vibration-Resistant Wedge Lock Washers
1329FA00050 Extreme-Vibration-Resistant Wedge Lock Washers

Image may differ from product. See technical specification for details.

Part No.
Part No. 1329FA00050
Equivalent to mcmaster :
91074A374

Basic Information

System of Measurement Inch and Metric
Washer Type Wedge Lock

Dimension Parameters

ID 2.33"
OD 3.35"
Thickness 0.270-0.290"

Material & Strength Parameters

Material Zinc-Flake Coated Steel
Hardness Rockwell C46

Installation & Application Parameters

For Screw Size 2 1/4", M56

Finish & Compliance Parameters

RoHS RoHS 3 (2015/863/EU) Compliant
REACH REACH (EC 1907/2006) (06/10/2022, 224 SVHC) Compliant

Special Type Parameters

Serration Location Top and Bottom
Technical Drawings No drawings available at the moment, will be launched soon
In Stock
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Key Features & Benefits at a Glance

  • Superior vibration resistance through wedge lock design prevents fastener loosening in high-stress applications
  • Enhanced corrosion protection with zinc-flake coating extends service life in harsh industrial environments
  • Maximum locking performance from dual top and bottom serrations creating multiple friction points
  • Exceptional durability with Rockwell C46 hardness maintaining structural integrity under heavy loads
  • Universal compatibility with both inch (2 1/4") and metric (M56) screw systems for flexible application
  • Precision dimensional control ensures consistent performance across all industrial assemblies
  • Full regulatory compliance meeting RoHS 3 and REACH standards for global market acceptance

Professional Applications & Engineering Value

This zinc-flake-coated steel wedge lock washer delivers critical vibration resistance in demanding industrial applications where fastener security is paramount. The dual serration technology on both top and bottom surfaces creates multiple biting edges that dig into both the fastener and mating surface, effectively preventing rotational loosening caused by machinery vibration, thermal cycling, or dynamic loading. Engineered with Rockwell C46 hardness, this heavy-duty washer maintains its structural integrity and locking force even under extreme pressure and repetitive stress cycles. The corrosion-resistant zinc-flake coating provides superior protection in outdoor, marine, or chemical-exposed environments, making it ideal for construction equipment, heavy machinery, transportation systems, and industrial assembly lines where reliability cannot be compromised.

Specification Summary & Compliance

This precision-engineered wedge lock washer features exact dimensional specifications with 2.33" ID and 3.35" OD with thickness maintained between 0.270-0.290" for consistent performance. Designed for compatibility with both 2 1/4" and M56 screw systems, it meets industrial standards for locking washers. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and global market acceptance for industrial procurement.

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